Re: [patch 28/38] mips: Select ARCH_HAS_RANDOM_ENTROPY

Maciej W. Rozycki
2026-04-13T05:47:58Z

On Fri, 10 Apr 2026, Thomas Gleixner wrote:

> The only solution for now is to uninline random_get_entropy(). Fix up all
> other dependencies on the content of asm/timex.h in those files which
> really depend on it.

Oh dear! I'd yet have to fully evaluate the consequences, but offhand
this has clearly turned what compiles to a single CPU instruction on the
vast majority of MIPS platforms into an expensive function call, possibly
also changing the caller from a leaf to a nested function with all the
associated execution penalty. Is there no other way?

Cf. commit 06947aaaf9bf ("MIPS: Implement random_get_entropy with CP0
Random").

Maciej